Skip to main content

Table 2 Basic characteristics of the total study population, as well as of the midpalatal suture separation and non-separation group

From: Efficacy of Miniscrew-Assisted Rapid Palatal Expansion (MARPE) in late adolescents and adults with the Dutch Maxillary Expansion Device: a prospective clinical cohort study

   Total Separation Non-separation
N   34 32 2
Age at start of expansion (years) Mean ± SD 27.0 ± 9.4 26.1 ± 8.2 41.2 ± 20.9
  Range 17.1–56.0 17.1–47.5 26.4–56.0
Sex Male 8 6 2
  Female 26 26 0
Angle classification Class I 6 5 1
  Class II/1 20 20 0
  Class II/2 6 5 1
  Class III 2 2 0
Posterior occlusion Unilateral crossbite 14 13 1
  Bilateral crossbite 4 4 0
  Anticipated crossbite 12 12 0
  Constriction without crossbite 4 3 1
Skeletal maturation stage CVM4 3 3 0
  CVM5 12 12 0
  CVM6 19 17 2
  1. SD, standard deviation; CVM, cervical vertebral maturation